I am looking for a lightweight tunneling protocol that operates over TCP for use in wireless networks. Your "vtun" looks like it might be a good candidate, but I have some questions that are not answered by your FAQ.
Note that many of these questions are based on our experience with PPTP, which is the protocol we are using now. Because PPTP cannot operate over TCP, and we want the retransmission and packet reordering features of TCP to compensate for dropped packets on the wireless network, we are looking for a tunneling protocol that does. 1. Does vtun use PPP internally? (Your Web pages mention that it was derived from a PPP implementation.) 2. How much does the encapsulation mechanism for the tunnel reduce the MTU? Does the vtun software set the MTU for its pseudo-interface automatically if the MTU of the TCP or UDP connection it is using is less than 1500? 3. Does the use of encryption or compression change the MTU, as it does in PPTP and PPPoE? 4. How does the vtun software test to see if the other party to the connection is still there? How often does it test? Is this configurable? 5. What happens if one of the parties to the connection is reset and doesn't send a signal telling the other side to terminate? Is there a mandatory delay before the connection can be re-established? 6. What is the difference between the types of tunnels that the software can create? (The types "pipe", "ether", and "tun" are listed in the configuration file examples, but there is no clear explanation of how each one is implemented.) Sorry to throw so many questions out all at once, but the documentation does not answer them. --Brett Glass ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Vtun-Users mailing list Vtun-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/vtun-users
